Bitcoin is not needed by anyone in the form of a payment system, because it does not possess the required characteristics of the payment system. There are other companies that can match. Here the question is not in what that specific crypto currency, but in the market as a whole. For example, in Japan legalized the crypto currency, now you can accept payments and organize payment systems on the basis of different crypto-currencies, and not just one. For the adoption of such laws, of course, approval of the regulator in each country is necessary. I think those countries that block and reject crypto-currencies will lag behind their IT development from those who will legitimize them.